2640145 has 8 divisors (see below), whose sum is σ = 3335040. Its totient is φ = 2000880.

The previous prime is 2640139. The next prime is 2640163. The reversal of 2640145 is 5410462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2640145 - 2³ = 2640137 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13801 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (416880).

2^2640145 is an apocalyptic number.

It is an amenable number.

2640145 is a deficient number, since it is larger than the sum of its proper divisors (694895).

2640145 is a wasteful number, since it uses less digits than its factorization.

2640145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27815.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2640145 is about 1624.8523009800. The cubic root of 2640145 is about 138.2109948856.

The spelling of 2640145 in words is "two million, six hundred forty thousand, one hundred forty-five".